Scripts to solve simple captchas.

• Some test images (captcha.png, captcha-0.png, ...)
• captcha_solver.py - a finalized module for solving captchas
• "Intermediate"-stage scripts:
  1. color-chanel.py splits images up into common color chanels
  2. rescale-threshold.py forces images to (at least) 300 DPI and applies a thresholding algorithm
  3. filter.py applies "expand" and "contract" filter (MinFilter / MaxFilter) to eliminate gaps
  4. solve-captcha.py solves a captcha from a hardcoded file path.